Pneumatic cleaner



SWECQ 1' H. HERTZ 1,823,542

PNEUMATIC CLEANER Filed ma 14. 1930 if ljalmarA/er/Z .Patented Sept. 15, 1931 UNITED TATES PATENT OFFICE Hil'ALMAB HEBTZ, OF ELIZABETH, NEW JERSEY, ASSIGNOR TO THE SINGER MANU- FACTURING COMPANY, OF ELIZABETH, NEW JERSEY, A CORPORATION OF NEW JERSEY Application filed Kay 14,

10 sists in the devices, combinations, and arrangements of parts hereinafter set forth and illustrated in the accompanying drawings of a preferred embodiment of the invention, from which the several features of 15 the invention and the advantages attained thereby will be readily understood by those skilled in the art.

In the accompanying drawings, Fig. 1 is a side elevation of a domestic or portable vacuum cleaner embodying the invention. Fig. 2 is a cross-sectional view through the intake nozzle of the cleaner. Fig. 3 is a perspective view and Fig. 4 a bottom plan view of the nozzle. 1 represents the fan-frame or casing havingthe intake nozzle 2 and outlet condult 3 to which is connected the dust-collector 4. Supported on the casing l is the motor 5 having the fan 6 mounted on its shaft 7 within the casing 1. The casing 1 is supported at its rearward end upon a pair of rollers, one of which is shown at 8, and there is pivotally connected at 9 to the casing 1 a handle 10.

While the vacuum cleaner is in use, the nozzle normally rests by gravityupon and slides over the surface of'the pile of the rug or carpet. The nozzle preferabl com rises a sheet-metal cap 11 formed wit an air intake slot 12. It also preferably comprises a sheet-metal envelope 13 surrounding the cap 11 but spaced therefrom to provide second-. ary air inlet slots 14 and narrower air-slots 15 adjacent the main or primary air intake slot 12. The envelope 13 has the spaced narrow flat-bottom surfaces 16 which move widthwise over the surface to 'be cleaned. The envelope 13 is necked or reduced in width at the intake orifices 14, thereb forming parallel roundedribs 17 at the ront at 1930. Serial No. 452,203.

rear edges of the nozzle bottom. A rubber of air are whirled through the nozzle, the

main current coming up directly through the rug, carpet or other fabric being cleaned.

Tw o side currents of air are at the same time whipped 1n through the secondary air passages 14, 15, at an angle; which side currents converge at a given point on the rug and join with the main air current, thereby creating a sweeping, brushing and agitating efi'ect desirable in surface cleaning.

For all ordinary cleaning operations the bumper 18 is allowed to remain in its upper position, so that both deep and surface cleaning are effected. Occasionally, however, the user may have a rug or part of a rug where there is an accumulation of heavy dirt. The present nozzle construction has the unique advantage that the bump'er 18 may be readily shifted into the lower groove 21 where it still functions as a bumper and also closes the secondary air inlets 18, thus concentrating the upward current of air 12 and enabling the cleaner to remove the deeply imbedded dirt most expeditiously.

N 0 claim is made herein for the constructive features of the nozzle apart from the feature of the shiftable bumper for closing or-opening asecondary air passage.

Having thus set forth the nature of the invention, what I claim herein is:-

1. In a vacuum cleaner, the combination with an air intake nozzle having externally disposed upper and lower grooves and main and secondary air-passages, the latter being 1 through the rug and in the main air intake disposed in one-of said grooves, and an elastic bumper band disposed in one of said grooves and adapted to be readily shifted to the other groove, whereby said secondary air-passage may be opened or closed at the will of the operator. 1

2. In a vacuum cleaner, the combination with a fan-casing having a suction nozzle formed with a carpet-engaging face, a downwardly directed main air intake orifice and a lateral secondary air intake orifice disposed directly above said face, of an elastic bumper band externally embracing said nozzle and closing said secondary air intake orifice, said band being shiftable on said nozzle to open said secondary air intake In testimony whereof, I have signed my name to this specification.

HJALMAR HERTZ. 

